| 苜蓿干草捆贮藏过程中的营养物质含量动态变化研究 |
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| 引用本文： | 范美超,贾玉山,成启明,包健,张静,侯鑫狄,赵牧其尔,荣荣,马天,付智慧,郝俊峰,格根图. 苜蓿干草捆贮藏过程中的营养物质含量动态变化研究[J]. 畜牧与饲料科学, 2019, 40(5): 44-48. DOI: 10.12160/j.issn.1672-5190.2019.05.009 |
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| 作者姓名： | 范美超 贾玉山 成启明 包健 张静 侯鑫狄 赵牧其尔 荣荣 马天 付智慧 郝俊峰 格根图 |
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| 作者单位： | [1]内蒙古农业大学草原与资源环境学院农业农村部饲草栽培、加工与高效利用重点实验室,内蒙古呼和浩特010011 |
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| 基金项目： | 国家牧草产业技术体系干草调制贮藏岗位专项(CARS-34)。 |
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| 摘 要： | 为探讨苜蓿干草捆贮藏过程中营养物质含量的动态变化规律,对含水量为15%、打捆密度为150kg/m3的苜蓿草捆在不同贮藏时间(1、10、30、90、180、360d)营养物质含量和相对饲喂价值(RFV)的动态变化情况进行研究。结果表明,在整个贮藏过程中,苜蓿干草的粗蛋白(CP)含量总体呈下降趋势,与贮藏1d时相比,不同贮藏时间段苜蓿干草的CP含量均显著下降(P<0.05);从CP含量角度评价,苜蓿干草等级由1级下降到2级。苜蓿干草的中性洗涤纤维(NDF)含量随贮藏时间的延长而增加,贮藏360d时的NDF含量显著高于贮藏时间在90d之内的NDF含量(P<0.05);从NDF含量角度评价,苜蓿干草等级由2级下降到3级。酸性洗涤纤维(ADF)含量也随贮藏时间的延长而增加,贮藏10d之后ADF含量开始显著增加(P<0.05);从ADF含量角度评价,苜蓿干草等级由1级下降到4级。贮藏时间在30d以上的苜蓿干草DMI值显著低于贮藏时间在30d之内的DMI值(P<0.05);从DMI值角度评价,苜蓿干草等级由1级下降到3级。贮藏时间在90d以上的苜蓿干草DDM值显著低于贮藏时间在90d之内的DDM值(P<0.05);从DDM值角度评价,苜蓿干草等级由1级下降到4级。随着贮藏时间的延长,苜蓿干草的RFV值显著降低(P<0.05),且在贮藏180~360d的时间段内,RFV值下降幅度较大;从RFV值角度评价,苜蓿干草等级由2级下降到3级。综合比较,苜蓿干草在贮藏180d之后营养价值大幅度下降,因此,在贮藏180d之内出售或者饲喂家畜比较适合。
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| 关 键 词： | 苜蓿干草捆 贮藏时间 营养物质 相对饲喂价值 |
| 收稿时间： | 2019-01-15 |
Characterization of Dynamic Changes of Nutrient Content in Alfalfa Hay Bales during Storage |
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| FAN Mei -chao,JIA Yu -shan,CHENG Qi -ming,BAO Jian,ZHANG Jing,HOU Xin -di,ZHAO Muqier,Rongrong,MA Tian,FU Zhi-hui,HAO Jun-feng,Gegentu. Characterization of Dynamic Changes of Nutrient Content in Alfalfa Hay Bales during Storage[J]. Animal Husbandry and Feed Science, 2019, 40(5): 44-48. DOI: 10.12160/j.issn.1672-5190.2019.05.009 |
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| Authors: | FAN Mei -chao JIA Yu -shan CHENG Qi -ming BAO Jian ZHANG Jing HOU Xin -di ZHAO Muqier Rongrong MA Tian FU Zhi-hui HAO Jun-feng Gegentu |
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| Affiliation: | [1]College of Grassland,Resource and Environment,Inner Mongolia Agricultural University,Hohhot 010011,China |
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| Abstract: | In order to assess the dynamic changes of nutrient content in alfalfa hay bales during storage, the dynamic changes of nutrient content and relative feeding value (RFV) of alfalfa hay bales with water content of 15% and bundles density of 150 kg/m3 at different storage durations (1, 10, 30, 90, 180, 360 d) were studied. The results showed that the crude protein (CP) content of alfalfa hay was decreased in the whole storage process;compared to the first day of storage, the CP content of alfalfa hay was decreased significantly in the other days of storage (P<0.05);from the perspective of CP content, the quality of alfalfa hay was decreased from grade 1 to grade 2. The content of neutral detergent fiber (NDF) of alfalfa hay was elevated with the prolongation of storage time;the content of NDF in the 360th day of storage was significantly higher than that in the 90th day of storage (P<0.05);from the perspective of NDF content, the quality of alfalfa hay was decreased from grade 2 to grade 3. The content of acid detergent fiber (ADF) was also increased with the prolongation of storage time, after 10 days of storage, the content of ADF began to increase significantly (P<0.05);from the perspective of ADF content, the quality of alfalfa hay was decreased from grade 1 to grade 4. The DMI value of alfalfa hay stored for more than 30 days was significantly lower than that within 30 days (P<0.05);from the perspective of DMI value, the quality of alfalfa hay was decreased from grade 1 to grade 3. The DDM value of alfalfa hay stored for more than 90 days was significantly lower than that stored for less than 90 days (P<0.05);from the perspective of DDM value, the quality of alfalfa hay was decreased from grade 1 to grade 4. With the prolongation of storage time, the RFV value of alfalfa hay was reduced significantly (P<0.05);the RFV value of alfalfa hay was decreased greatly during 180 -360 days of storage;from the perspective of RFV value, the quality of alfalfa hay was decreased from grade 2 to grade 3. In general, the nutritional value of alfalfa hay was significantly reduced after 180 days of storage. Therefore, the alfalfa hay was recommended to be sold or fed to livestock within 180 days of storage. |
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| Keywords: | alfalfa hay bundles storage time nutrient relative feeding value |
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